266 British Uvedinee and Ustilaginee. 
on four occasions in 1886, with MZ. populina, from P. pyramidalis, but 
always without success; and in 1888, from P. a/ba, with the same 
result. 
Aicidium sonchi. Johnst. 
‘Minute, scattered, whitish or cream-coloured, prominent. Spores 
ovate, rather large.” 
Synonym. 
Johnst., “ Flor. Berw.,” vol. ii. p..205. 
On the under surface of the leaves of Sonchus arvensis, in 
autumn. 
“The cover does not split so regularly, and is not so decidedly 
cupped, as is commen in this genus.” 
AGcidium ranunculacearum. D. C. 
Pseudoperidia hypophyllous in soundish. or elongated clusters of 
various sizes, cup-shaped, whitish, margin brittle. Spores 
polygonal, orange-yellow, 17-28 X 14-20p. 
Synonym. 
Winter, doc. cit., p. 269. ‘Grev., “ Flor. Edin.,” p. 446. D.C., 
“ Flore frang.,” vol. vi. p. 97. 
On Ranunculus dingua. Duddingston. Loch ; Dr. Greville. 
Aicidium dracontii. Schw. 
Pseudoperidia on extensive pallid: spots on the.leaves, sometimes 
almost covering them, arranged without order, elongate. 
Spores orange. 
Synonym. 
Atcidium dracontii. Schw., Trans.. Am. Phil. Sot., 1834. 
Cooke, “ Hdbk.,” p. 538; “Micro. Fungi,” 4th edit., p. 200. 
On Arum triphyllum. In gardens, Melbury, 1863 ;'M. JB. 
This can hardly be considered a British Species. 
AGcidium strobilinum. (Alb. and Schw.) 
Pseudoperidia numerous, in clusters on the inner surface of the 
scales of the fallen cones, hemispherical or polygonal from 
